METHOD OF STATE CONTROL OF A LONG OBJECT AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC F17D5/02 G01M3/24 

FIELD: test and measurement equipment.

SUBSTANCE: invention relates to instrumentation and can be used to control the parameters of long objects and extended areas in various environments. Information-measuring fiber optic cable having four sensitive fiber-optic pairs, each of which contains two parallel cylindrical quartz glass fibers parallel to each other along a common generatrix, placed in a common light-reflecting shell, are fixed on the surface of all devices of an oil and gas pipeline. Optical pulses are generated and fed to the input of the reference channel of each sensitive pair, optical signals are obtained at the outputs of all pairs of the cable and their photoconversion to electrical signals is performed, then these electrical signals are synchronously detected, integrated, amplified and converted into space-time distributions of curvature, bending forces, vibration fields and temperature along the main oil and gas pipeline. To perform these operations, a device is used that includes a pulsed coherent laser, connected through an optical amplifier and optical connector to the input of an information and measuring fiber optic cable that is successively fixed on the surfaces of all devices of the main oil and gas pipeline, and the output of the cable also through the optical connector and the photodetector unit is connected to the input of a demodulator whose output is connected to a series-connected analog-to-digital converter (ADC) unit, a Fast Fourier Transform (FFT) processor, computing device and a video terminal, the second output of the ADC unit being directly connected to the second input of the computing device, the third input of which is connected to the output of an additional installed buffer memory.

EFFECT: higher accuracy and selectivity of the control due to expansion of a range of the data at the control of the state of the main oil and gas pipeline.

22 cl, 11 dwg